Lead Paint Assessment in Construction

Sanding, scraping, heat stripping, and power tool preparation of lead-painted surfaces generates fine lead dust and fume. Renovations in pre-1970 buildings are the highest-risk scenario. Testing painted surfaces with XRF analysers or paint chip sampling before disturbance determines lead content and appropriate controls.

Demolition of buildings, bridges, and industrial structures with lead-based paint and coatings generates airborne lead dust. The demolition contractor must assess lead paint presence as part of the pre-demolition hazardous materials survey per AS 4361.2. Workers in the demolition zone require personal air monitoring and biological monitoring.

Abrasive blasting, flame cutting, and welding on structural steel with legacy lead paint coatings produces extremely high lead fume concentrations. Bridge repainting and tank maintenance are among the highest lead exposure tasks in the construction industry. Full containment and supplied-air respiratory protection are typically required.

Exterior lead paint weathering over decades deposits lead-contaminated dust in surrounding soil. Excavation and earthworks adjacent to lead-painted buildings can resuspend lead-contaminated soil. Surface wipe sampling and soil lead testing quantify the contamination extent.

Typical Worker Groups

Common similar exposure groups (SEGs) assessed for this sub-category.

Regulatory Context

The WHS Regulation defines lead risk work and lead process work with specific control requirements. Biological monitoring (blood lead) is mandatory for workers carrying out lead risk work and must be conducted by a registered medical practitioner. Air monitoring determines the level of airborne lead exposure to classify the work and determine controls. AS 4361.2 provides guidance for lead paint management in buildings. The PCBU must ensure blood lead levels do not exceed removal levels and must remove workers from lead exposure if levels are exceeded.